Uli has released a hack, tested on the Dingoo A320, which allows Dingux to access the TV-OUT chip. The hack comes with risks to your TV set, and is only the first of its kind. Hopefully this hack will eventually lead to a safe alternative for TV-OUT Dingux emulator support!

Quoted from Warning:

This will wreak havoc on the TV output and may cause the TV encoder to send rather disturbing signals to your TV. Judging from the sounds my TV set makes in that case, I could imagine that this might be harmful. As for CRT TVs, in theory, it could fry it if something goes wrong.